any advice on diving in Cancun?? i.e. good dive companies?

[settinggirl]

Thanks for the information.  I actually dove with a guide that worked right from the resort we stayed at. The reef was a 10 minute boat ride from where we stayed at in Riviera Maya.  Very strong drift so we dropped in the water and basically floated the whole way along the reef.  The boat picked us up at the end.  There was some hurricane damage on the reef from the 2005 hurricanes but not nearly as much as nearer to shore.